630538 has 4 divisors (see below), whose sum is σ = 945810. Its totient is φ = 315268.

The previous prime is 630529. The next prime is 630559. The reversal of 630538 is 835036.

630538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 190969 = 663^2 + 437^2 .

It is an unprimeable number.

630538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157633 + ... + 157636.

2⁶³⁰⁵³⁸ is an apocalyptic number.

630538 is a deficient number, since it is larger than the sum of its proper divisors (315272).

630538 is a wasteful number, since it uses less digits than its factorization.

630538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315271.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 630538 is about 794.0642291402. The cubic root of 630538 is about 85.7505843614.

The spelling of 630538 in words is "six hundred thirty thousand, five hundred thirty-eight".